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Hybrid silicon-carbon nanostructures for broadband optical absorption

TitleHybrid silicon-carbon nanostructures for broadband optical absorption
Publication TypeJournal Article
Year of Publication2017
AuthorsYang, WH, Lu, WC, Ho, KM, Wang, CZ
JournalRCS Advances
Date Published01
Type of ArticleArticle
ISBN Number2046-2069
Accession NumberWOS:000393757100074
Keywordsanode material, arrays, C-60, chemistry, light-scattering, lithium-ion batteries, nanoparticles, quantum dots, solar-cells, surface, x-ray-scattering

Proper design of nanomaterials for broadband light absorption is a key factor for improving the conversion efficiency of solar cells. Here we present a hybrid design of silicon-carbon nanostructures with silicon clusters coated by carbon cages, i.e., Si-m@C(2)n for potential solar cell application. The optical properties of these hybrid nanostructures were calculated based on time dependent density function theory (TDDFT). The results show that the optical spectra of Si-m@C(2)n are very different from those of pure Sim and C-2n clusters. While the absorption spectra of pure carbon cages and Sim clusters exhibit peaks in the UV region, those of the Si-m@C(2)n nanostructures exhibit a significant red shift. Superposition of the optical spectra of various Si-m@C(2)n nanostructures forms a broad-band absorption, which extends to the visible light and infrared regions. The broadband adsorption of the assembled Si-m@C(2)n nanoclusters may provide a new approach for the design of high efficiency solar cell nanomaterials.

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Exploratory Theory

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Short TitleRSC Adv.
Alternate JournalRSC Adv.